<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>state简写</title>
</head>
<body>
    <!-- 准备好一个“容器” -->
    <div id="test"></div>
    <!-- 引入react核心库 -->
    <script type="text/javascript" src="../js/react.development.js"></script>
    <!-- 引入react-dom 用于支持react操作DOM -->
    <script type="text/javascript" src="../js/react-dom.development.js"></script>
    <!-- 引入babel 用于将jsx转换为js -->
    <script type="text/javascript" src="../js/babel.min.js"></script>

    <script type="text/babel">  // 此处一定要写babel
    // 1. 创建组件
    class Weather extends React.Component {
        // 初始化状态
        state = {isHot: false, wind: '微风'}

        render() {
            const {isHot, wind} = this.state

            return <h2 onClick={this.changeWeather}>今天天气很{isHot ? '炎热' : '凉爽'}，{wind}</h2>

        }

        // 自定义方法 - 要用赋值语句的形式 + 箭头函数
        changeWeather = () => {
            const isHot = this.state.isHot
            this.setState({isHot: !isHot})
        }
    }
    // 2. 渲染虚拟组件到页面
    ReactDOM.render(<Weather/>, document.getElementById('test'))

    </script>
</body>
</html>